I have a fart egg that has the yellow yolk. What the heck?

[DogAndCat36]

I have never actually got a fart egg ever untill now. I decided to blow the yolk out and found this.

I don't understand. I thought that fart eggs don't have the yellow yolk? Help me out please.

 

[sourland]

Some do, but generally not a fully formed/viable yolk.

 

[DogAndCat36]

Some do, but generally not a fully formed/viable yolk.

Ok. Thank you!

 

[3KillerBs]

From my in-town flock I had fairy eggs that had no yolks, fairy eggs that were perfect miniatures with tiny yolks exactly the same proportional size as if they were full-sized eggs, and, once or twice, a fairy egg that was nothing but yolk with no white at all